<?php

namespace Common\Lib\Util;

/**
 * 通用的树型类，可以生成任何树型结构
 */
class Tree {

	/**
	 * 生成树型结构所需要的2维数组
	 * @var array
	 */
	public $arr = array();

	/**
	 * 生成树型结构所需修饰符号，可以换成图片
	 * @var array
	 */
	public $icon = array('│', '├', '└');
	public $nbsp = "&nbsp;";

	/**
	 * @access private
	 */
	public $ret = '';

	/**
	 * 构造函数，初始化类
	 * @param array 2维数组，例如：
	 * array(
	 *      1 => array('id'=>'1','parentid'=>0,'name'=>'一级栏目一'),
	 *      2 => array('id'=>'2','parentid'=>0,'name'=>'一级栏目二'),
	 *      3 => array('id'=>'3','parentid'=>1,'name'=>'二级栏目一'),
	 *      4 => array('id'=>'4','parentid'=>1,'name'=>'二级栏目二'),
	 *      5 => array('id'=>'5','parentid'=>2,'name'=>'二级栏目三'),
	 *      6 => array('id'=>'6','parentid'=>3,'name'=>'三级栏目一'),
	 *      7 => array('id'=>'7','parentid'=>3,'name'=>'三级栏目二')
	 *      )
	 */
	public function init($arr = array()) {
		$this->arr = $arr;
		$this->ret = '';
		return is_array($arr);
	}

	/**
	 * 得到父级数组
	 * @param int
	 * @return array
	 */
	public function get_parent($myid) {
		$newarr = array();
		if (!isset($this->arr[$myid])) {
			return false;
		}
		$pid = $this->arr[$myid]['parentid'];
		$pid = $this->arr[$pid]['parentid'];
		if (is_array($this->arr)) {
			foreach ($this->arr as $id => $a) {
				if ($a['parentid'] == $pid) {
					$newarr[$id] = $a;
				}
			}
		}
		return $newarr;
	}

	/**
	 * 得到子级数组
	 * @param int
	 * @return array
	 */
	public function get_child($myid) {
		$a = $newarr = array();
		if (is_array($this->arr)) {
			foreach ($this->arr as $id => $a) {
				if ($a['parentid'] == $myid) {
					$newarr[$id] = $a;
				}
			}
		}
		return $newarr ? $newarr : false;
	}

	/**
	 * 得到当前位置数组
	 * @param int
	 * @return array
	 */
	public function get_pos($myid, &$newarr) {
		$a = array();
		if (!isset($this->arr[$myid])) {
			return false;
		}
		$newarr[] = $this->arr[$myid];
		$pid = $this->arr[$myid]['parentid'];
		if (isset($this->arr[$pid])) {
			$this->get_pos($pid, $newarr);
		}
		if (is_array($newarr)) {
			krsort($newarr);
			foreach ($newarr as $v) {
				$a[$v['id']] = $v;
			}
		}
		return $a;
	}

	/**
	 * 得到树型结构
	 * @param int ID，表示获得这个ID下的所有子级
	 * @param string 生成树型结构的基本代码，例如："<option value=\$id \$selected>\$spacer\$name</option>"
	 * @param int 被选中的ID，比如在做树型下拉框的时候需要用到
	 * @return string
	 */
	public function get_tree($myid, $str, $sid = 0, $adds = '', $str_group = '') {
		$number = 1;
		//一级栏目
		$child = $this->get_child($myid);
		if (is_array($child)) {
			$total = count($child);
			foreach ($child as $id => $value) {
				$j = $k = '';
				if ($number == $total) {
					$j .= $this->icon[2];
				} else {
					$j .= $this->icon[1];
					$k = $adds ? $this->icon[0] : '';
				}
				$spacer = $adds ? $adds . $j : '';
				$selected = $id == $sid ? 'selected' : '';
				extract($value);
				$parentid == 0 && $str_group ? eval("\$nstr = \"$str_group\";") : eval("\$nstr = \"$str\";");
				$this->ret .= $nstr;
				$nbsp = $this->nbsp;
				$this->get_tree($id, $str, $sid, $adds . $k . $nbsp, $str_group);
				$number++;
			}
		}
		return $this->ret;
	}

	/**
	 * 得到树型结构数组
	 * @param int ID，表示获得这个ID下的所有子级
	 * @param string 生成树型结构的基本代码，例如："<option value=\$id \$selected>\$spacer\$name</option>"
	 * @param int 被选中的ID，比如在做树型下拉框的时候需要用到
	 * @return string
	 */
	public function get_tree_array($myid, $str, $sid = 0, $adds = '', $str_group = '') {
		$retarray = array();
		//一级栏目数组
		$child = $this->get_child($myid);
		if (is_array($child)) {
			//数组长度
			$total = count($child);
			foreach ($child as $id => $value) {
				extract($value);
				$retarray[$value['id']] = $value;
				$retarray[$value['id']]["child"] = $this->get_tree_array($id, '');
			}
		}
		return $retarray;
	}

	/**
	 * 同上一方法类似,但允许多选
	 */
	public function get_tree_multi($myid, $str, $sid = 0, $adds = '') {
		$number = 1;
		$child = $this->get_child($myid);
		if (is_array($child)) {
			$total = count($child);
			foreach ($child as $id => $a) {
				$j = $k = '';
				if ($number == $total) {
					$j .= $this->icon[2];
				} else {
					$j .= $this->icon[1];
					$k = $adds ? $this->icon[0] : '';
				}
				$spacer = $adds ? $adds . $j : '';

				$selected = $this->have($sid, $id) ? 'selected' : '';
				extract($a);
				eval("\$nstr = \"$str\";");
				$this->ret .= $nstr;
				$this->get_tree_multi($id, $str, $sid, $adds . $k . '&nbsp;');
				$number++;
			}
		}
		return $this->ret;
	}

	/**
	 * @param integer $myid 要查询的ID
	 * @param string $str   第一种HTML代码方式
	 * @param string $str2  第二种HTML代码方式
	 * @param integer $sid  默认选中
	 * @param integer $adds 前缀
	 */
	public function get_tree_category($myid, $str, $str2, $sid = 0, $adds = '') {
		$number = 1;
		$child = $this->get_child($myid);
		if (is_array($child)) {
			$total = count($child);
			foreach ($child as $id => $a) {
				$j = $k = '';
				if ($number == $total) {
					$j .= $this->icon[2];
				} else {
					$j .= $this->icon[1];
					$k = $adds ? $this->icon[0] : '';
				}
				$spacer = $adds ? $adds . $j : '';

				$selected = $this->have($sid, $id) ? 'selected' : '';
				extract($a);
				if (empty($html_disabled)) {
					eval("\$nstr = \"$str\";");
				} else {
					eval("\$nstr = \"$str2\";");
				}
				$this->ret .= $nstr;
				$this->get_tree_category($id, $str, $str2, $sid, $adds . $k . '&nbsp;');
				$number++;
			}
		}
		return $this->ret;
	}

	/**
	 * 同上一类方法，jquery treeview 风格，可伸缩样式（需要treeview插件支持）
	 * @param $myid 表示获得这个ID下的所有子级
	 * @param $effected_id 需要生成treeview目录数的id
	 * @param $str 末级样式
	 * @param $str2 目录级别样式
	 * @param $showlevel 直接显示层级数，其余为异步显示，0为全部限制
	 * @param $style 目录样式 默认 filetree 可增加其他样式如'filetree treeview-famfamfam'
	 * @param $currentlevel 计算当前层级，递归使用 适用改函数时不需要用该参数
	 * @param $recursion 递归使用 外部调用时为FALSE
	 */
	function get_treeview($myid, $effected_id = 'example', $str = "<span class='file'>\$name</span>", $str2 = "<span class='folder'>\$name</span>", $showlevel = 0, $style = 'filetree ', $currentlevel = 1, $recursion = FALSE) {
		$child = $this->get_child($myid);
		if (!defined('EFFECTED_INIT')) {
			$effected = ' id="' . $effected_id . '"';
			define('EFFECTED_INIT', 1);
		} else {
			$effected = '';
		}
		$placeholder = '<ul><li><span class="placeholder"></span></li></ul>';
		if (!$recursion) {
			$this->str .='<ul' . $effected . '  class="' . $style . '">';
		}
		foreach ($child as $id => $a) {

			extract($a);
			if ($showlevel > 0 && $showlevel == $currentlevel && $this->get_child($id)) {
				$folder = 'hasChildren';
			} //如设置显示层级模式@2011.07.01
			$floder_status = isset($folder) ? ' class="' . $folder . '"' : '';
			$this->str .= $recursion ? '<ul><li' . $floder_status . ' id=\'' . $id . '\'>' : '<li' . $floder_status . ' id=\'' . $id . '\'>';
			$recursion = FALSE;
			//判断是否为终极栏目
			if ($child == 1) {
				eval("\$nstr = \"$str2\";");
				$this->str .= $nstr;
				if ($showlevel == 0 || ($showlevel > 0 && $showlevel > $currentlevel)) {
					$this->get_treeview($id, $effected_id, $str, $str2, $showlevel, $style, $currentlevel + 1, TRUE);
				} elseif ($showlevel > 0 && $showlevel == $currentlevel) {
					$this->str .= $placeholder;
				}
			} else {
				eval("\$nstr = \"$str\";");
				$this->str .= $nstr;
			}
			$this->str .=$recursion ? '</li></ul>' : '</li>';
		}
		if (!$recursion) {
			$this->str .='</ul>';
		}
		return $this->str;
	}

	/**
	 * 同上一类方法，jquery treeview 风格，可伸缩样式（需要treeview插件支持）
	 * @param $myid 表示获得这个ID下的所有子级
	 * @param $effected_id 需要生成treeview目录数的id
	 * @param $str 末级样式
	 * @param $str2 目录级别样式
	 * @param $showlevel 直接显示层级数，其余为异步显示，0为全部限制
	 * @param $style 目录样式 默认 filetree 可增加其他样式如'filetree treeview-famfamfam'
	 * @param $currentlevel 计算当前层级，递归使用 适用改函数时不需要用该参数
	 * @param $recursion 递归使用 外部调用时为FALSE
	 * @param $dropdown 有子元素时li的class
	 */
	function get_treeview_menu($myid, $effected_id = 'example', $str = "<span class='file'>\$name</span>", $str2 = "<span class='folder'>\$name</span>", $showlevel = 0, $ul_class = "", $li_class = "", $style = 'filetree ', $currentlevel = 1, $recursion = FALSE, $dropdown = 'hasChild') {
		$child = $this->get_child($myid);
		if (!defined('EFFECTED_INIT')) {
			$effected = ' id="' . $effected_id . '"';
			define('EFFECTED_INIT', 1);
		} else {
			$effected = '';
		}
		$placeholder = '<ul><li><span class="placeholder"></span></li></ul>';
		if (!$recursion) {
			$this->str .='<ul' . $effected . '  class="' . $style . '">';
		}

		foreach ($child as $id => $a) {
			extract($a);
			if ($showlevel > 0 && is_array($this->get_child($a['id']))) {
				$floder_status = " class='$dropdown $li_class'";
			} else {
				$floder_status = " class='$li_class'";
			}
			$this->str .= $recursion ? "<ul class='$ul_class'><li  $floder_status id= 'menu-item-$id'>" : "<li  $floder_status   id= 'menu-item-$id'>";
			$recursion = FALSE;
			//判断是否为终极栏目
			if ($this->get_child($a['id'])) {
				$str2 = str_replace('\\$', "\$", $str2);
				eval("\$nstr = \"$str2\";");
				$this->str .= $nstr;
				if ($showlevel == 0 || ($showlevel > 0 && $showlevel > $currentlevel)) {
					$this->get_treeview_menu($a['id'], $effected_id, $str, $str2, $showlevel, $ul_class, $li_class, $style, $currentlevel + 1, TRUE);
				} elseif ($showlevel > 0 && $showlevel == $currentlevel) {
					$this->str .= $placeholder;
				}
			} else {
				$str = str_replace('\\$', "\$", $str);
				eval("\$nstr = \"$str\";");
				$this->str .= $nstr;
			}
			$this->str .=$recursion ? '</li></ul>' : '</li>';
		}
		if (!$recursion) {
			$this->str .='</ul>';
		}
		return $this->str;
	}

	/**
	 * 获取子栏目json
	 * Enter description here ...
	 * @param unknown_type $myid
	 */
	public function creat_sub_json($myid, $str = '') {
		$sub_cats = $this->get_child($myid);
		$data = array();
		$n = 0;
		if (is_array($sub_cats)) {
			foreach ($sub_cats as $c) {
				$data[$n]['id'] = iconv(CHARSET, 'utf-8', $c['catid']);
				if ($this->get_child($c['catid'])) {
					$data[$n]['liclass'] = 'hasChildren';
					$data[$n]['children'] = array(array('text' => '&nbsp;', 'classes' => 'placeholder'));
					$data[$n]['classes'] = 'folder';
					$data[$n]['text'] = iconv(CHARSET, 'utf-8', $c['catname']);
				} else {
					if ($str) {
						extract(array_iconv($c, CHARSET, 'utf-8'));
						eval("\$data[$n]['text'] = \"$str\";");
					} else {
						$data[$n]['text'] = iconv(CHARSET, 'utf-8', $c['catname']);
					}
				}
				$n++;
			}
		}
		return json_encode($data);
	}

	private function have($list, $item) {
		return(strpos(',,' . $list . ',', ',' . $item . ','));
	}

}
